Drive for paper-drying machines and the like



Nov. 27, 1928.

'B. A. MALKIN DRIVE FOR PAPER DRYING MACHINES AND THE LIKE Filed Nov.27, 1925 2 Sheets-Sheet 1 INVZNTOR BERNARHILM/ILK IN AT T ORNEI S 2 Sheets-Sheet 2 K INVENTOR BERNARDJLMIILKII B. A. MALKIN Filed Nov. 27, 1925 DRIVE FOR PAPER DRYING MACHINES AND THE LIKEv Nov. 27, 1928.

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A.. IALKINQbF LACHINE, Q UEBEC, CANADA.

DRIVE FOB PAPER-DRYING MACHINES AITZI) THE LIKE.

Application filed November 27, 1925. Serial No. 71,802.

This invention relates to new and useful improvements in paper making machines and pa particularly to the main driving gear for paper drying machines and the object of the 5 invention is to provide a main driving gear of the class stated which will be highly eflicient in operation and which will avoid the accumulative inefliciency of the long train of gears in machines of this class in use at the present time. j

Another object of the invention is to provide a gear of the class stated, which 'will allow drying machines to be operated at high speeds by reducing the pitch line speeds of the. gears as usually arranged in machines of this class at present in use.

A further object is to provide a driving mechanism of the class stated in which all the gears will run in oil tight ear cases, to

reduce the wear in the gears o the machine and also to reduce the noise of the working of the machine to a minimum.

A still further object is to provide a totally enclosed drive of the class stated which will provide an absolute centering means between each pair of rolls to ensure proper meshin of the gears, a feature which is not provid for in driers as at present constructed.

' Other advantages will be apparent to per-- 1 sons familiar with this art from the follow-.

- ing description.

In my invention, I provide 'a longitudinal 5 driving shaft, extending from end to end of the machine, and driven from a source (not shown). Driven by'bevel wheels and bevel pinions are the toothed pinions, which mesh with toothed wheels, secured to the ends of the drier roll shafts. The drier roll gears are arranged'in units, each unit being enclosed in 40 oil tight gfiegr cases and adapted to drive a air of re referably one upper and one lbwer roll. T e tooth wheels run in oil and the casings areso arranged that a rfect circulation of the lubricant is obtained when u the machine is in operation.

v In the drawings which illustrate certain embodiments of my invention.

Figure 1 is a side elevation of part of a drying machine showing my improved drivso ing mechanism.

Figure 2 is a side elevation of part of a paper making machine showing one modified form of drive from that shown in Figure 1.

Figure 3 is an enlarged side elevation of rt of the machine with parts out or broken to show the drive more clearly. 1

Figure 4 is'a sectional elevation of one of the roll driving gears taken on the line H Figure 3;

Figure 5' is a sectional elevation taken on the line 5-5 Figure 3;

- Referring more particularly to the drawings, 11 designates the frame of a paper making machine, upon which are mounted in stag-' gered relationship, the upper and lower drier rolls 12 and 13. Between each pair of upper and lower rolls and rotatably mounted in suitable bearings 14, are the g'uide rolls 15,

- which form a means for guiding the drier felts through the machine. The felts are mounted in the usual manner, that is over one sect on of one of the rolls, under the guide .rolls and over the adjacent drier rolls. The

paper sheet travels through the machine between the felts and the drier rolls, that is over an upper and then under a lower roll-asit passes from one end of the machine to the other. This construction is practically stand-- and construction in this type of machine and is well known in this art. This invention lies in the means used for driving the rolls and also difiers from my prior ap lication Serial No. 32,404 filed on May 23r 1925, in that a combined stead of the bevel and worm gear drive used in the construction detailed insai-zl' prior applaication. The drier roll spindles 16 extend yond the bearings 17, supporting the rolls and secured in any suitable manner to its spindles are the toothed gear wheels 18, which mesh with toothed gear pinions 19, rotatably mounted onspindles, 20, secured to the easing 21, hereinafter described; The bore of the hubs 22, are made slightly larger in diameter than the spindles and are formed to ride on a double conical roller bearing 23, held in place on said spindle by any suitable means, such as the pin andwasher 24 and shoulder 25, illustrated in Figure 4. Secured to the side of the toothed gear pinions in any suitable manner, are the bevel tooth gear wheels 26. In Figure 4, I have shown the webs 27 of the tooth pinionspositioned to one side and the wheels 26 secured thereto by bolts, but this may be altered to suit W052i conditions and existing material as req bevel and spur wheel is used in- Extending for the full length of the machine and positioned between the upper and lower sets of rolls, is the main driving shaft 27, to which are.- secured the tooth bevel pinions 28, in such a manner as to mesh with the bevel toothed wheels 26. The outer face 29 of thehubs or bosses 30 of the pinions, contact with the faces 31 of the bearings 32, so that bending of thelongitudinal shaft 27 is reduced toa The bearings are made of the split type, so that the caps 33 may be readily removed for erecting or dismantling the machine. Each pair of adjacent upper and lower dlrier rolls are mounted in suitable gear cases 34, which are made oil tight so that a perfectcirculation of lubricant is maintained within the casing, by rotation of the gears- The casings may be made in sections to facilitate inspection and repairs to the machine. In Fi re 4, I have shown in detail part of one of t e casings, the-back portion 35 of which is secured to one upper and one lower roller support bearing and is so formed that the bearings 32 for the longitudinal shaft and bearings 36 for the spindles 20, are formed by castin them integral with the portion 35. As will seen from such construction, that once the bearings in the casing are machined, all arts which gear with one another will mes properly. Covers 37 may be secured to, the portion 35 by any suitable means, to enclose the bevel toothed wheels and pinions and also the toothed gear pinions 19. Suitable covers 38, may be provided for the toothed gear wheels and may be attached to the rest of the casing in any suit- "able manner. The covers 38 may be formed with apertures 39, which fit over the-roll sup porting. spindles and suitable packings 40 may be aced' in grooves 41 to prevent oil from lea g through the casing between the roll indle and the walls of the apertures. Suitible sealing means (not shown), may be placed at the ends 42 ofthe casings and oil thrower rings 43 may be formed on the longitudinal shaft between its supporting bear mgs within the casing to maintain the circulation of oil while the'shaft is rotating. The above is made suitable for self-lubricatlon, but by connecting the casing to a source of oil supply under pressure, an even more even V distribution'jof lubricant ,may be obtained.

The foregoing description relates to the of drive shown in F1 re 1 and detailed m gures 3, 4 and 5. the modified type of drive shownin F1 2 only one set of bevels, namelyjone' vel tooth wheel 45 and one bevel toothed pinion 46 are used in each casing, but an idler ,toothed wheel 47 is used as an extra unit to reverse'the motion of the upper drier rolls. In Figure 2 the idlers are shown between-the toothed gear wheels driving'the'upper rolls-and'the toothed gear pinions secured in an'y suitable manner to the I toothed bevel pinions 46 and may be constructed in a similar mannerto that shown in Figure 4. All other parts of the mechanism may be made in a similar manner to that shown in Figure 1. Suitable couplings. 48 may be, used for coupling the sections of the longitudinal shaft together and a toothed pinion or wheel 49 may be mounted approximately in the longitudinal centre of the shaft to gear with the driving mechanism such as a motor pinion, (not shown).

- Modifications may be made without departing from the spirit of the. invention.

' In operation the drier rolls rotate in the manner shown by the arrows and the paper travels from left to right of the machine. As will be seen the upper rolls rotate in the op posite direction to the lower rolls and this necessitates making provision for driving the roller gear wheels from'diiferent pinions ing only one bevel toothed wheel and pinionand using an idler to rotate the upper roll in the opposite direction. The gears being mounted in independent cases containing a set of gears to drive an up er and a lower roll ensure that the gears W1 1 mesh properly,

this will be set in the making of the casings. The gears all run in oil tight casings and are therefore subjected to a proper source of lubrication which tends to lengthen the life of the contacting parts, as'well as forming a means for reducing the noise of the working of the machine to a minimum, and also prevents oil from falling or being thrown on to the sheet of paper being dried.

This arrangement of gears also reduces the accumulative inefliciency of the spur drive usuall employed in machines of this class, and t erefore requires less power to drive it when compared with machines as at present constructed.

Having I claim is: r

1. In a paper making machine, a frame, a'plurality of secured to spin es rotatably mounted 'on said frame, toothed gear wheels secured toextensions of said spindles, toothed gear,

pinions meshing with the wheels and rotatupper and lower drier rolls 3 thus described my invention, what I ably mounted on spindles-secured to suitable bearings, aimam driving shaft, extending the full length of the machine beveltoothed wheels secured to said pinions and bevel toothed pinions mounted on the shaft and meshing with the bevel wheels to form a driving connection between the shaft and upper and. ower rolls rotatablymounted in the toothed pinions. 2. Ina aper making machine having extending the full length of the machine between the upper and lower rolls, toothed gear wheels and pinions for driving said rolls, bevel toothed wheels and pinions form: ing a driving connection between the main shaft and the toothed pinions and casings surrounding the gears required to operate the adjacent upper and lower rolls.

3. In a paper making machine have a plurality of upper and lower rolls "rotatably mounted in staggered relationship on a frame, a main driving shaft extending the full length of the machine between the upper and lower rolls, spur and bevel toothed gear wheels forming a driving'connection between the main driving shaft and the drier rolls,

.and oil tight casings surround each set of gearingdriving one upper and one lower roll.

4. In a paper making machine having a 'pluralit of upper and lower rolls rotatably mounte in staggered relationship on spindles in suitable bearings formed in a frame, a main driving shaft'extending in the longitudinal direction of the machine from end to end thereof and between the upper and lower rolls driving gear which includes spur tooth gear wheels mounted on, extensions to the roll spindles, spindles secured to the casings, spur toothed gear wheels rotatably mounted on said spindles and meshing with the wheels, bevel toothed gear wheels adapted to rotate said pinions and bevel toothed gear pinions mounted on said shaft and meshing with the bevel toothed wheels. a

5. A paper making machine according to claim 4 having the casings secured to'the upper and lower roll bearing and oil tight covers centering the gearing between the roll spindles and the longitudinal driving shaft.

6. A paper. making machine having upper and lower rolls secured to spindles mounted in hearings in staggered relationship in a frame, extension to said spindles'projectmg beyond the frame, gear casing between each pair of adjacent upper and lower rolls, a main driving shaft rotatably mounted in bearings in the casing and extending from end to end of the machine,

spur toothed wheels on said Spindle extension and within the casings, spur toothed pinions rotatably mounted on spindles extending from bearings formed in the casing and evel toothed wheels and pinions forming a driving con- .nection between themain driving shaft and the spur toothed pinions.

7 In a paper drying machine the combination with a drier roll of peripherally toothed spur gear fixed to one end of the spindle and having a diameter less than that of the roll, a casing carried by the spindle and enclosing said spur gear, a spindle journalled in'said casing, a peripherally toothed spur gear carried by the spindle andmeshing with the spur gear of. the

roll spindle, a drive shaft extending through said casing and a drive connection between said drive shaft and the second ment1oned spur gear including intermeshing beveled pinions.

8. In a paper drying machine of the type in which the drying rolls are arranged in upper and lower rows with therolls of one row staggered with respect to the rolls of the remaining row, the provision of a relatively large drive gear attached to the spindle of each roll and made of a diameter less than that of the roll, a gear'casing carried by each roll spindle and enclosing the drive gear attached to said spindle, the said gear casing of each upper roll being connected to the corresponding casing of the adjacent lower roll by an intermediate casing, a drive shaft extendin longitudinally from end'toe BERNARD a. MALKIN,

and its spindle, 

